Diffuser.



C. C. FRICKE.

DIFFUSER. APPLICATION FIL ED MAY 19. 917- Patented Feb. 11, 1919.

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I DIFFUSER.

Specification of Letters Patent.

Patented Feb. 11, 1919.

' Application filed May 19, 1917. Serial No. 169,641.

To all whom it may concern:

Be it known that I, CHARLES C. FRICKE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in- Diflusers for use inconnection with lighting units of the type shown in United States DesignLetters Patent #50427, issued March 6, 1917, of which the following is aspecification.

Devices of this kind are usually supported by means of a holder securedto the upper portion thereof from the center of which depends the socketfor the lamp. This holder pockets a good deal of the light flux as wellas failing to reflect any part thereof.

My invention has for its object to provide a device which willcompletely cover the holder, and [which will be constructed of materialwhich will reflect and diffuse the light flux, thereby materiallyincreasing the appearance and efiiciency of the unit, and has for itsfurther object to provide a device which will be self supporting andwill not require additional mechanism to hold it in place, other thanthat furnished by the globe of the lighting fixture. V

My means of accomplishing the foregoing objects may be more readilyunderstood by having referenceto the accompanying drawings, which arehereunto annexed and are a part of this specification, in which:

Figure 1 is a side elevation of the nitrogen unit referred to, partlybroken away to show the use and operation of my diffusing and reflectingmember.

Fig. 2 is an enlarged detail view of the diffusing and reflectingmember.

Similar reference numerals refer to similar parts throughout the entiredescription.

As shown in the drawings, the lighting unit 3, is supported by a holder4, which is provided with the usual thumb screws 5, to engage the neck6, of the unit 3. The holder is secured in the usual mannerto a ceilingcanopy 7, attached to the usual outlet. The electric 'wires are securedto the socket 10, which carries a type C lamp 11. Mounted intermediatethe inner portion of the neck 6, and the upper end 12 of the electriclamp 11, is mounted my difl using and reflecting member 13. This membermay be manufactured of glass, metal, paper, IWOOd or fiber and coatedwith suitable material to reflect and diffuse the rays of light strikingthereon.

The shape of the diffusing member 13, makes it self adjusting in theneck or collar part of the holder 4, so that no additional screws orother fittings are needed.

As shown in the drawings, the difiusing member is flared with anoutwardly flaring wall 14, and an inwardly concave portion 15, therebeing an opening 16 in the center of the diffusing member to permit thepassage of the end 12, of the electric lamp 11.

Practice has shown that the use of this device, on a nitrogen unit ofthe type described materially increases the efliciency of the unitwithout adding enough to the expense to effect the saving by its use.

Having described my invention what I regard as new and desire to secureby Letters Patent is:

The combination with a. lighting unit, comprising an upper and lowerreflector, and a central holder supporting the upper reflector, of adiffusing and reflecting member mounted within said unit, said memberbeing in the shape of an annulus, having side walls which flareoutwardly and engage the neck of the upper reflector, and an in wardlydepending conoidal portion, said member being formedof material whichwill diffuse and reflect the light rays.

In testimony whereof I have signed the foregoing specification.

